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Clarifies the meaning of the external mutability. #34621

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Jul 7, 2016
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Clarifies the meaning of the external mutability. #34621

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Clarifies the meaning of the external mutability.
GuillaumeRochat Jul 3, 2016
6a85183
Replace it's by its.
GuillaumeRochat Jul 5, 2016
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4 changes: 2 additions & 2 deletions src/doc/book/mutability.md
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Expand Up @@ -62,8 +62,8 @@ Note that here, the `x` is mutable, but not the `y`.
# Interior vs. Exterior Mutability

However, when we say something is ‘immutable’ in Rust, that doesn’t mean that
it’s not able to be changed: we mean something has ‘exterior mutability’. Consider,
for example, [`Arc<T>`][arc]:
it’s not able to be changed: we are referring to its ‘exterior mutability’ that
in this case is immutable. Consider, for example, [`Arc<T>`][arc]:

```rust
use std::sync::Arc;
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